support angular 6 or above for developer. In the root project, Open angular.json file. Look up Styles[] add below. "styles": [ "src/styles.scss", "node_modules ...

In the root project, Open angular.json file. Look up Styles[] add below. "styles": [ "src/styles.scss", "node_modules/datatables.net-bs4/css/dataTables.bootstrap4.css ...